Types of abstracts. There are two types of abstracts: descriptive and informative. They have different aims, so as a consequence they have different components and styles. There is also a third type called critical, but it is rarely used.
Samsung Galaxy Note 7 smartphone has been banned from all aircraft in the United States. The US Transportation Department and other agencies have banned passengers from carrying on the devices or putting them inside checked baggage during flights.
Here's the real reason airlines are dealing you the mute button on your cell phone. As anyone who has flown has heard, using a cellular telephone aboard an airplane is dangerous. American Airlines warns passengers that cell phones may interfere with the aircraft's communication and navigation systems..